The free wristbands have become tradition on Taylor’s global Eras tour and they light up in sync during her show to create immersive visual effects.

However, after the Australian leg of the tour came to an end on Monday, Swifties have been warned about properly disposing of the wristband’s batteries.

B-cycle, Australia’s official battery stewardship scheme, took to Instagram on Friday to issue advice to the 600,000 fans Down Under who attended Taylor’s epic shows.

Hundreds of thousands of Taylor Swift fans have attended the singer’s seven sold-out Eras tour concerts across Australia, and each were given a free LED wristband upon their arrival

After the Australian leg of the tour came to an end on Monday, Swifties have been warned about properly disposing of the wristband’s batteries by B-cycle

They urged fans to remove the batteries from the wristband – even if they plan to keep the band itself as a keepsake – and take them to a B-cycle drop-off point, rather than tossing them in the bin.

They wrote: ‘T-Swift has left the building… but your battery hazard hasn’t!

‘If you were one of 600,000 attendees at Taylor Swift’s recent Australian shows, you likely still have your special edition battery operated wristband.

‘While these added great visual effects during the performances, it’s incredibly important that you know how to properly dispose of the two button batteries included in each wristband as these can be a health hazard if ingested or a fire hazard if disposed of in household waste or recycling.

‘Once you’ve removed the batteries from the wristband, please do the following: 1. Don’t toss them in general waste and recycling bins / 2. Tape them using clear sticky tape (for button batteries this is on all sides) / 3. Take them to your nearest B-cycle accredited Drop off point.’

The free wristbands have become tradition on Taylor’s global Eras tour and they light up in sync during her show to create immersive visual effects

Some Swifties have been trying to cash in on their wristbands after Taylor brought her Australian tour to an epic close at Sydney’s Accor Stadium on Monday night.

Many concertgoers have been trying to flog their free concert wristbands for hundreds of dollars on Facebook Marketplace.

They are advertising the bands for as much as $300 each thanks to the huge demand for the keepsakes.

While some were modestly priced, some are listed for as much as $300 each.

One advert described the item as ‘used’ but ‘like new’, assuring potential buyers the light was ‘still blinking’.

Elsewhere, some Swifties have been trying to cash in on their wristbands, putting them up for sale for massive prices – with one fan listing seven wristbands for $1200

Another Swiftie put a staggering seven wristbands up for sale for a massive $1200, with the cost per wristband at $171.40.

Meanwhile, other fans are selling small plastic bags of confetti they claimed to have collected at the show for as much as $50 for ten pieces.

Fans have also been reselling merchandise bought at the concerts as a huge number of advertisements continue to circulate on sites including Facebook Marketplace.

Swifties paid huge prices for the merchandise, with massive crowds lined up before the shows.

Posters were priced at $40, while a tour hoodies cost a staggering $120 and T-shirts were priced at $65.

More than 600,000 Swifties attended the Australian leg of the Eras tour, while thousands more fans didn’t manage to get their hands on the sought-after tickets

Among other items, water bottles were priced at a huge $40 and canvas tapestries were available to buy for $55.

More than 600,000 Swifties attended the Australian leg of the Eras tour, while thousands more fans didn’t manage to get their hands on the sought-after tickets.

A record-breaking 96,000 fans attended each of her three nights in Melbourne and a further 83,000 Swifties flocked to each of her four shows in Sydney.